Fluid sealed housing for an electrical component

ABSTRACT

A regenerable electrical condenser is disposed in a can-type housing having a lid tightly sealed thereto to prevent leakage. The condenser includes a mechanically operable fuse therein secured to the can and to the lid, and the can has corrugations for expansion upon a buildup of gas to cause separation of the fuse element. The lid is welded to the can to maintain a liquidtight seal both before and after operation of the fuse.

United States Patent lnventors Alfred Grunert;

Glass Werner, Heidenheim-Brenz,

Germany App]. No. 889,018 I Filed July 16, 1969 Patented Apr. 6, 1971 Assignee Siemens Aktiengesellschaft Berlin and Munich, Germany Priority July 16, 1968 Germany G 67 53 244 FLUID SEALED HOUSING FOR AN ELECTRICAL COMPONENT 2 Claims, 1 Drawing Fig.

u.s.c| 317/230, 317/242 Int.Cl l-I0lg1/02, l-IOlq 9/08 Field ofSearch 317/230,

[56] References Cited UNITED STATES PATENTS 2,575,726 11/1951 Peck 317/245 2,714,184 7/1955 Peck 317/245 3,040,220 6/1962 Neibaur..... 317/245 3,196,324 7/1965 Stuetzer 317/231 Primary Examiner-James D. Kallam Att0rney-Hill, Sherman, Meroni, Gross & Simpson ill!!! Q C z 06/" 6 /0519 4 BY W ATTYS.

l'llllllll l FLUID SEALED HOUSING FOR AN ELECTRICAL COMPONENT BACKGROUND OF THE INVENTION 1. Field of the Invention This invention .relates to a metal housing for an electrical component, and is more particularly concerned with metal housings for electrical components wherein the housings undergo a structural change upon a buildup of gas therein to lo SUMMARY OF THE INVENTION According to the invention a metal housing having corrugations and effective to operate a disconnect fuse upon an internal pressure buildup is provided as a fluid-tight structure both before and after operation of the fuse. The housing includes a can-type structure, preferably of aluminum. The cover may be metal or a ceramic material having a metal periphery for welding to the remainder of the housing.

BRIEF DESCRIPTION OF THE DRAWING Other objects, features and advantages of the invention will be readily apparent from the following description of a preferred embodiment thereof, taken in conjunction with the accompanying drawing, although variations and modifications may be effected without departing from the spirit and scope of the novel concepts of the disclosure, and in which the single figure is an elevational view of an oil-impregnated regenerably electrical condenser shown in cross section.

DESCRIPTION OF THE PREFERRED EMBODIMENT In the drawing, the electrical component is illustrated as having had the fuse operated. The fuse may be provided as a weakened point in one of the connecting wires 1 of an oil-impregnated regenerable electrical capacitor coil 5 which is mounted in a can-type housing 4 so that the lower end of the wire I is substantially fixed in relation to the housing 4.

The connecting wire I is guided through a sealed insulating member 2 in the cover 3 to the exterior of the device. The cover 3 is welded to the upper edge of the housing 4, to provide a fluid-tight seal. The upper edge of the housing may, as shown in the drawing, embrace the cover or the cover may have at its lower edge a peripheral groove into which the housing edge is inserted and sealed.

, The housing 4 is provided with at least one corrugation 6 which by elongation due to the buildup of gas above maximum admissable internal pressure causes separation of the fuse, in this case wire 1.

Preferably the housing and the cover are made of aluminum. The cover also may be made of insulating material, such as a ceramic, whereby the outer edge of the material carries a metal ring sealed thereto. As a result of the tightly welded, solid connection between cover and housing a safe fluid-tight seal results. This is also applicable to housings where the fuse is operated by bulging the housing cover.

Generally then there has been described the provision of a metal housing for an electrical component, particularly an electrical condenser, with a disconnect fuse which is operated upon reaching a maximum admissable internal pressure due to the buildup of gas, by a structural change of the housing, the housing being sealed by a cover and remaining sealed even after operation of the fuse.

We claim: I. In an electrical component having a housing compnsmg means for producing a structural change of shape in response to a change of internal pressure and a disconnect fuse means operable in response to said structural change, said housing having a cup portion and a cover portion, the improvement comprising means for maintaining a fluid-tight seal between said cup portion and said cover portion.

2. The improvement according to claim I wherein the cup portion is metal and at least the periphery of the cover portion is metal and said means for providing a fluid-tight seal comprises a weld. 

1. In an electrical component having a housing comprising means for producing a structural change of shape in response to a change of internal pressure and a disconnect fuse means operable in response to said structural change, said housing having a cup portion and a cover portion, the improvement comprising means for maintaining a fluid-tight seal between said cup portion and said cover portion.
 2. The improvement according to claim 1 wherein the cup portion is metal and at least the periphery of the cover portion is metal and said means for providing a fluid-tight seal comprises a weld. 